JINGLES'S PROFILE

I must say in advanced im sorry if this is in the wrong topic, for my question i thought was fairly abstract and couldn't find a topic exactly suitable for it
anyways:

Iv'e been working on a game for a bit now, and you know of course i think its awesome because it's my game

but some thing iv'e been paranoid on is that i'm afraid i'll finish my game put it up and it's the worst shit compared to all the games out there

For
1.i barely have any custom model files for i've had a bunch of trouble either finding the right ones or it not working
2.some times i feel like my game drags on and other times feels like it zips by too quickly and i don't know if most games are like that
and other small things that im not sure if it makes or breaks a game

so if some one could please either show me a average/moderate game or inform me that not having custom model files are okay

thank you
-jingles